5 Troubleshooting
CF21M*
5-5
5-1-8 Abnormal H_Size
The Voltage waveforms at
Q402 Collector are right?
Repeat the troubleshooting
Guide of H_deflection failure.
Check some parts around
IC250 and IC402 Pin 1 and 2.
Yes
No
5-1-9 Side Pin or Trap Failure
IC250 Pin 24 output exists?
The waveform is right?
Check and replace IC250.
5-1-10 Para. or Pin Balance Failure
IC250 Pin 24 output varies with
different DAC values?
No
Replace IC261.
No
7
T402 pin 8 wareform is right?
Replace T402.
Yes
Check and replace IC402.
Check some parts IC402 Pin 2
and IC250 Pin 24.
Yes
No
8
9
WAVEFORMS
8
T402, #8
WAVEFORMS
9
IC250, #24
7
Q402, Collector
Summary of Contents for CF21M
Page 7: ...CF21M 6 1 6 Exploded View and Parts List ...
Page 17: ...10 Schematic Diagrams 10 6 CF21M 1 368 V IC601 1 ...
Page 19: ...10 Schematic Diagrams 10 8 CF21M 19 IC103 5 24 15 CRT Socket Red Green Blue 20 R G B Video ...
Page 21: ...10 Schematic Diagrams 10 10 CF21M Memo ...
Page 22: ...Memo 9 Wiring Diagram 9 2 CF21M ...
Page 23: ...Memo 8 Block Diagrams 8 2 CF21M ...
Page 48: ...Memo 7 Electrical Parts List 7 26 CF21M ...
Page 49: ...7 Electrical Parts List CF21M 7 27 Loc No Code No Description Specification Remarks ...
